二维数组，根据某一字段，分组

$obj_visit_doctor = $this->obj_visit_doctor->getModels()->groupBy('day')->toArray();

 

foreach($obj_visit_doctor as $key=>$value){
$doctor_am = array_filter($value, function($doctor){
return $doctor['time'] == 1;
});
$doctor_pm = array_filter($value, function($doctor){
return $doctor['time'] == 2;
});
$obj_visit_doctor[$key] = [
'1' => array_pluck($doctor_am, 'doctor_id'),
'2' => array_pluck($doctor_pm, 'doctor_id')
];
}